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    <title>利用网上的Caeser算法写了一个唯一id生成工具 | Anttu&#39;s Blog</title>
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            <h1 class="post-title">利用网上的Caeser算法写了一个唯一id生成工具</h1>
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        <date class="post-meta meta-date">
            2017年4月10日
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                <a href='/categories/java' target="_blank">java</a>
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                <a href='/categories/union_id' target="_blank">union_id</a>
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            <h2 id="前言">前言</h2>
<p>工作中需要用到，不需要用uuid这种太长的，但是需要有自己特色标识的，于是晚上搜集了部分算法和思路，加工出来一个唯一随机id生成类</p>
<h2 id="思路">思路</h2>
<p>改造过的Caesar算法，利用随机数加密，生成前12位 + 后4位随机数，经测试大量数据和实际使用验证，无重复值出现，可以放心使用</p>
<h2 id="1代码">1、代码</h2>
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</span></code></pre></td>
<td style="vertical-align:top;padding:0;margin:0;border:0;;width:100%">
<pre tabindex="0" style="background-color:#fff;-moz-tab-size:4;-o-tab-size:4;tab-size:4;"><code class="language-java" data-lang="java"><span style="display:flex;"><span><span style="color:#998;font-style:italic">// key  
</span></span></span><span style="display:flex;"><span><span style="color:#998;font-style:italic"></span><span style="color:#000;font-weight:bold">private</span> <span style="color:#000;font-weight:bold">static</span> String KEYS <span style="color:#000;font-weight:bold">=</span> <span style="color:#d14">&#34;0123456789qwertyuiopasdfghjklzxcvbnm&#34;</span><span style="color:#000;font-weight:bold">;</span>  
</span></span><span style="display:flex;"><span>  
</span></span><span style="display:flex;"><span><span style="color:#998;font-style:italic">/** 
</span></span></span><span style="display:flex;"><span><span style="color:#998;font-style:italic"> * 唯一id生成工具类，12位字母+数字 
</span></span></span><span style="display:flex;"><span><span style="color:#998;font-style:italic"> *  
</span></span></span><span style="display:flex;"><span><span style="color:#998;font-style:italic"> * @param id 随机整数即可 
</span></span></span><span style="display:flex;"><span><span style="color:#998;font-style:italic"> */</span>  
</span></span><span style="display:flex;"><span><span style="color:#000;font-weight:bold">public</span> <span style="color:#000;font-weight:bold">static</span> String <span style="color:#900;font-weight:bold">getRandomId</span><span style="color:#000;font-weight:bold">(</span><span style="color:#458;font-weight:bold">int</span> id<span style="color:#000;font-weight:bold">)</span>  
</span></span><span style="display:flex;"><span><span style="color:#000;font-weight:bold">{</span>  
</span></span><span style="display:flex;"><span>    String ret <span style="color:#000;font-weight:bold">=</span> <span style="color:#000;font-weight:bold">null</span><span style="color:#000;font-weight:bold">;</span>  
</span></span><span style="display:flex;"><span>    String num <span style="color:#000;font-weight:bold">=</span> String<span style="color:#000;font-weight:bold">.</span><span style="color:#008080">format</span><span style="color:#000;font-weight:bold">(</span><span style="color:#d14">&#34;%09d&#34;</span><span style="color:#000;font-weight:bold">,</span> id<span style="color:#000;font-weight:bold">);</span>  
</span></span><span style="display:flex;"><span>    Random random <span style="color:#000;font-weight:bold">=</span> <span style="color:#000;font-weight:bold">new</span> Random<span style="color:#000;font-weight:bold">();</span>  
</span></span><span style="display:flex;"><span>    <span style="color:#458;font-weight:bold">int</span> key <span style="color:#000;font-weight:bold">=</span> random<span style="color:#000;font-weight:bold">.</span><span style="color:#008080">nextInt</span><span style="color:#000;font-weight:bold">(</span>10<span style="color:#000;font-weight:bold">);</span>  
</span></span><span style="display:flex;"><span>    <span style="color:#458;font-weight:bold">int</span> seed <span style="color:#000;font-weight:bold">=</span> random<span style="color:#000;font-weight:bold">.</span><span style="color:#008080">nextInt</span><span style="color:#000;font-weight:bold">(</span>100<span style="color:#000;font-weight:bold">);</span>  
</span></span><span style="display:flex;"><span>    Caesar caesar <span style="color:#000;font-weight:bold">=</span> <span style="color:#000;font-weight:bold">new</span> Caesar<span style="color:#000;font-weight:bold">(</span>KEYS<span style="color:#000;font-weight:bold">,</span> seed<span style="color:#000;font-weight:bold">);</span>  
</span></span><span style="display:flex;"><span>    num <span style="color:#000;font-weight:bold">=</span> caesar<span style="color:#000;font-weight:bold">.</span><span style="color:#008080">encode</span><span style="color:#000;font-weight:bold">(</span>key<span style="color:#000;font-weight:bold">,</span> num<span style="color:#000;font-weight:bold">);</span>  
</span></span><span style="display:flex;"><span>    ret <span style="color:#000;font-weight:bold">=</span> num <span style="color:#000;font-weight:bold">+</span> String<span style="color:#000;font-weight:bold">.</span><span style="color:#008080">format</span><span style="color:#000;font-weight:bold">(</span><span style="color:#d14">&#34;%01d&#34;</span><span style="color:#000;font-weight:bold">,</span> key<span style="color:#000;font-weight:bold">)</span> <span style="color:#000;font-weight:bold">+</span> String<span style="color:#000;font-weight:bold">.</span><span style="color:#008080">format</span><span style="color:#000;font-weight:bold">(</span><span style="color:#d14">&#34;%02x&#34;</span><span style="color:#000;font-weight:bold">,</span> seed<span style="color:#000;font-weight:bold">);</span>  
</span></span><span style="display:flex;"><span>  
</span></span><span style="display:flex;"><span>    <span style="color:#000;font-weight:bold">return</span> ret<span style="color:#000;font-weight:bold">;</span>  
</span></span><span style="display:flex;"><span><span style="color:#000;font-weight:bold">}</span>  
</span></span><span style="display:flex;"><span>  
</span></span><span style="display:flex;"><span><span style="color:#998;font-style:italic">/** 
</span></span></span><span style="display:flex;"><span><span style="color:#998;font-style:italic"> * id唯一值生成工具类&lt;br&gt; 
</span></span></span><span style="display:flex;"><span><span style="color:#998;font-style:italic"> * 格式：test_xxxx，总共21位随机码  
</span></span></span><span style="display:flex;"><span><span style="color:#998;font-style:italic"> * @return test_+16位随机码 
</span></span></span><span style="display:flex;"><span><span style="color:#998;font-style:italic"> */</span>  
</span></span><span style="display:flex;"><span><span style="color:#000;font-weight:bold">public</span> <span style="color:#000;font-weight:bold">static</span> String <span style="color:#900;font-weight:bold">getID</span><span style="color:#000;font-weight:bold">()</span>  
</span></span><span style="display:flex;"><span><span style="color:#000;font-weight:bold">{</span>  
</span></span><span style="display:flex;"><span>    <span style="color:#998;font-style:italic">// 前缀  
</span></span></span><span style="display:flex;"><span><span style="color:#998;font-style:italic"></span>    String prefix <span style="color:#000;font-weight:bold">=</span> <span style="color:#d14">&#34;test_&#34;</span><span style="color:#000;font-weight:bold">;</span>  
</span></span><span style="display:flex;"><span>    <span style="color:#998;font-style:italic">// 随机码  
</span></span></span><span style="display:flex;"><span><span style="color:#998;font-style:italic"></span>    String main <span style="color:#000;font-weight:bold">=</span> TestRandomUUID<span style="color:#000;font-weight:bold">.</span><span style="color:#008080">getRandomId</span><span style="color:#000;font-weight:bold">(</span><span style="color:#000;font-weight:bold">new</span> Random<span style="color:#000;font-weight:bold">().</span><span style="color:#008080">nextInt</span><span style="color:#000;font-weight:bold">(</span>1000000<span style="color:#000;font-weight:bold">));</span>  
</span></span><span style="display:flex;"><span>    String end <span style="color:#000;font-weight:bold">=</span> RandomUtils<span style="color:#000;font-weight:bold">.</span><span style="color:#008080">getRandomAlphamericStrNew</span><span style="color:#000;font-weight:bold">(</span>4<span style="color:#000;font-weight:bold">);</span>  
</span></span><span style="display:flex;"><span>      
</span></span><span style="display:flex;"><span>    <span style="color:#000;font-weight:bold">return</span> prefix <span style="color:#000;font-weight:bold">+</span> main <span style="color:#000;font-weight:bold">+</span> end<span style="color:#000;font-weight:bold">;</span>  
</span></span><span style="display:flex;"><span><span style="color:#000;font-weight:bold">}</span>  
</span></span><span style="display:flex;"><span>
</span></span><span style="display:flex;"><span><span style="color:#000;font-weight:bold">public</span> <span style="color:#000;font-weight:bold">class</span> <span style="color:#458;font-weight:bold">RandomUtils</span>  
</span></span><span style="display:flex;"><span><span style="color:#000;font-weight:bold">{</span>  
</span></span><span style="display:flex;"><span>     <span style="color:#998;font-style:italic">/** 
</span></span></span><span style="display:flex;"><span><span style="color:#998;font-style:italic">     * 获得特定长度的一串随机数字 
</span></span></span><span style="display:flex;"><span><span style="color:#998;font-style:italic">     *  
</span></span></span><span style="display:flex;"><span><span style="color:#998;font-style:italic">     * @param length  
</span></span></span><span style="display:flex;"><span><span style="color:#998;font-style:italic">     * @return 
</span></span></span><span style="display:flex;"><span><span style="color:#998;font-style:italic">     */</span>  
</span></span><span style="display:flex;"><span>    <span style="color:#000;font-weight:bold">public</span> <span style="color:#000;font-weight:bold">static</span> String <span style="color:#900;font-weight:bold">getRandomNumberStr</span><span style="color:#000;font-weight:bold">(</span><span style="color:#458;font-weight:bold">int</span> length<span style="color:#000;font-weight:bold">)</span>  
</span></span><span style="display:flex;"><span>    <span style="color:#000;font-weight:bold">{</span>  
</span></span><span style="display:flex;"><span>        StringBuilder builder <span style="color:#000;font-weight:bold">=</span> <span style="color:#000;font-weight:bold">new</span> StringBuilder<span style="color:#000;font-weight:bold">();</span>  
</span></span><span style="display:flex;"><span>        Random random <span style="color:#000;font-weight:bold">=</span> <span style="color:#000;font-weight:bold">new</span> Random<span style="color:#000;font-weight:bold">();</span>  
</span></span><span style="display:flex;"><span>        <span style="color:#000;font-weight:bold">for</span> <span style="color:#000;font-weight:bold">(</span><span style="color:#458;font-weight:bold">int</span> i <span style="color:#000;font-weight:bold">=</span> 0<span style="color:#000;font-weight:bold">;</span> i <span style="color:#000;font-weight:bold">&lt;</span> length<span style="color:#000;font-weight:bold">;</span> i<span style="color:#000;font-weight:bold">++)</span>  
</span></span><span style="display:flex;"><span>        <span style="color:#000;font-weight:bold">{</span>  
</span></span><span style="display:flex;"><span>            builder<span style="color:#000;font-weight:bold">.</span><span style="color:#008080">append</span><span style="color:#000;font-weight:bold">(</span>random<span style="color:#000;font-weight:bold">.</span><span style="color:#008080">nextInt</span><span style="color:#000;font-weight:bold">(</span>10<span style="color:#000;font-weight:bold">));</span>  
</span></span><span style="display:flex;"><span>        <span style="color:#000;font-weight:bold">}</span>  
</span></span><span style="display:flex;"><span>        <span style="color:#000;font-weight:bold">return</span> builder<span style="color:#000;font-weight:bold">.</span><span style="color:#008080">toString</span><span style="color:#000;font-weight:bold">();</span>  
</span></span><span style="display:flex;"><span>    <span style="color:#000;font-weight:bold">}</span>  
</span></span><span style="display:flex;"><span>  
</span></span><span style="display:flex;"><span>    <span style="color:#998;font-style:italic">/** 
</span></span></span><span style="display:flex;"><span><span style="color:#998;font-style:italic">     * 获得特定长度的一个随机字母数字混编字符串（所包含的字符包括0-9A-Z) 
</span></span></span><span style="display:flex;"><span><span style="color:#998;font-style:italic">     *  
</span></span></span><span style="display:flex;"><span><span style="color:#998;font-style:italic">     * @param length 
</span></span></span><span style="display:flex;"><span><span style="color:#998;font-style:italic">     * @return 
</span></span></span><span style="display:flex;"><span><span style="color:#998;font-style:italic">     */</span>  
</span></span><span style="display:flex;"><span>    <span style="color:#000;font-weight:bold">public</span> <span style="color:#000;font-weight:bold">static</span> String <span style="color:#900;font-weight:bold">getRandomAlphamericStr</span><span style="color:#000;font-weight:bold">(</span><span style="color:#458;font-weight:bold">int</span> length<span style="color:#000;font-weight:bold">)</span>  
</span></span><span style="display:flex;"><span>    <span style="color:#000;font-weight:bold">{</span>  
</span></span><span style="display:flex;"><span>        StringBuilder builder <span style="color:#000;font-weight:bold">=</span> <span style="color:#000;font-weight:bold">new</span> StringBuilder<span style="color:#000;font-weight:bold">();</span>  
</span></span><span style="display:flex;"><span>        Random random <span style="color:#000;font-weight:bold">=</span> <span style="color:#000;font-weight:bold">new</span> Random<span style="color:#000;font-weight:bold">();</span>  
</span></span><span style="display:flex;"><span>        <span style="color:#000;font-weight:bold">for</span> <span style="color:#000;font-weight:bold">(</span><span style="color:#458;font-weight:bold">int</span> i <span style="color:#000;font-weight:bold">=</span> 0<span style="color:#000;font-weight:bold">;</span> i <span style="color:#000;font-weight:bold">&lt;</span> length<span style="color:#000;font-weight:bold">;</span> i<span style="color:#000;font-weight:bold">++)</span>  
</span></span><span style="display:flex;"><span>        <span style="color:#000;font-weight:bold">{</span>  
</span></span><span style="display:flex;"><span>            <span style="color:#458;font-weight:bold">int</span> n <span style="color:#000;font-weight:bold">=</span> random<span style="color:#000;font-weight:bold">.</span><span style="color:#008080">nextInt</span><span style="color:#000;font-weight:bold">(</span>36<span style="color:#000;font-weight:bold">);</span>  
</span></span><span style="display:flex;"><span>            <span style="color:#000;font-weight:bold">if</span> <span style="color:#000;font-weight:bold">(</span>n <span style="color:#000;font-weight:bold">&lt;</span> 10<span style="color:#000;font-weight:bold">)</span>  
</span></span><span style="display:flex;"><span>            <span style="color:#000;font-weight:bold">{</span>  
</span></span><span style="display:flex;"><span>                builder<span style="color:#000;font-weight:bold">.</span><span style="color:#008080">append</span><span style="color:#000;font-weight:bold">(</span>n<span style="color:#000;font-weight:bold">);</span>  
</span></span><span style="display:flex;"><span>            <span style="color:#000;font-weight:bold">}</span>  
</span></span><span style="display:flex;"><span>            <span style="color:#000;font-weight:bold">else</span>  
</span></span><span style="display:flex;"><span>            <span style="color:#000;font-weight:bold">{</span>  
</span></span><span style="display:flex;"><span>                builder<span style="color:#000;font-weight:bold">.</span><span style="color:#008080">append</span><span style="color:#000;font-weight:bold">((</span><span style="color:#458;font-weight:bold">char</span><span style="color:#000;font-weight:bold">)</span> <span style="color:#000;font-weight:bold">(</span>n <span style="color:#000;font-weight:bold">+</span> 55<span style="color:#000;font-weight:bold">));</span>  
</span></span><span style="display:flex;"><span>            <span style="color:#000;font-weight:bold">}</span>  
</span></span><span style="display:flex;"><span>        <span style="color:#000;font-weight:bold">}</span>  
</span></span><span style="display:flex;"><span>        <span style="color:#000;font-weight:bold">return</span> builder<span style="color:#000;font-weight:bold">.</span><span style="color:#008080">toString</span><span style="color:#000;font-weight:bold">();</span>  
</span></span><span style="display:flex;"><span>    <span style="color:#000;font-weight:bold">}</span>  
</span></span><span style="display:flex;"><span>  
</span></span><span style="display:flex;"><span>    <span style="color:#998;font-style:italic">/** 
</span></span></span><span style="display:flex;"><span><span style="color:#998;font-style:italic">     * 获得特定长度的一个随机字母数字混编字符串（所包含的字符包括0-9a-z) 
</span></span></span><span style="display:flex;"><span><span style="color:#998;font-style:italic">     *  
</span></span></span><span style="display:flex;"><span><span style="color:#998;font-style:italic">     * @param length 
</span></span></span><span style="display:flex;"><span><span style="color:#998;font-style:italic">     * @return 
</span></span></span><span style="display:flex;"><span><span style="color:#998;font-style:italic">     */</span>  
</span></span><span style="display:flex;"><span>    <span style="color:#000;font-weight:bold">public</span> <span style="color:#000;font-weight:bold">static</span> String <span style="color:#900;font-weight:bold">getRandomAlphamericStrNew</span><span style="color:#000;font-weight:bold">(</span><span style="color:#458;font-weight:bold">int</span> length<span style="color:#000;font-weight:bold">)</span>  
</span></span><span style="display:flex;"><span>    <span style="color:#000;font-weight:bold">{</span>  
</span></span><span style="display:flex;"><span>        StringBuilder builder <span style="color:#000;font-weight:bold">=</span> <span style="color:#000;font-weight:bold">new</span> StringBuilder<span style="color:#000;font-weight:bold">();</span>  
</span></span><span style="display:flex;"><span>        Random random <span style="color:#000;font-weight:bold">=</span> <span style="color:#000;font-weight:bold">new</span> Random<span style="color:#000;font-weight:bold">();</span>  
</span></span><span style="display:flex;"><span>        <span style="color:#000;font-weight:bold">for</span> <span style="color:#000;font-weight:bold">(</span><span style="color:#458;font-weight:bold">int</span> i <span style="color:#000;font-weight:bold">=</span> 0<span style="color:#000;font-weight:bold">;</span> i <span style="color:#000;font-weight:bold">&lt;</span> length<span style="color:#000;font-weight:bold">;</span> i<span style="color:#000;font-weight:bold">++)</span>  
</span></span><span style="display:flex;"><span>        <span style="color:#000;font-weight:bold">{</span>  
</span></span><span style="display:flex;"><span>            <span style="color:#458;font-weight:bold">int</span> n <span style="color:#000;font-weight:bold">=</span> random<span style="color:#000;font-weight:bold">.</span><span style="color:#008080">nextInt</span><span style="color:#000;font-weight:bold">(</span>36<span style="color:#000;font-weight:bold">);</span>  
</span></span><span style="display:flex;"><span>            <span style="color:#000;font-weight:bold">if</span> <span style="color:#000;font-weight:bold">(</span>n <span style="color:#000;font-weight:bold">&lt;</span> 10<span style="color:#000;font-weight:bold">)</span>  
</span></span><span style="display:flex;"><span>            <span style="color:#000;font-weight:bold">{</span>  
</span></span><span style="display:flex;"><span>                builder<span style="color:#000;font-weight:bold">.</span><span style="color:#008080">append</span><span style="color:#000;font-weight:bold">(</span>n<span style="color:#000;font-weight:bold">);</span>  
</span></span><span style="display:flex;"><span>            <span style="color:#000;font-weight:bold">}</span>  
</span></span><span style="display:flex;"><span>            <span style="color:#000;font-weight:bold">else</span>  
</span></span><span style="display:flex;"><span>            <span style="color:#000;font-weight:bold">{</span>  
</span></span><span style="display:flex;"><span>                builder<span style="color:#000;font-weight:bold">.</span><span style="color:#008080">append</span><span style="color:#000;font-weight:bold">((</span><span style="color:#458;font-weight:bold">char</span><span style="color:#000;font-weight:bold">)</span> <span style="color:#000;font-weight:bold">(</span>n <span style="color:#000;font-weight:bold">+</span> 87<span style="color:#000;font-weight:bold">));</span>  
</span></span><span style="display:flex;"><span>            <span style="color:#000;font-weight:bold">}</span>  
</span></span><span style="display:flex;"><span>        <span style="color:#000;font-weight:bold">}</span>  
</span></span><span style="display:flex;"><span>        <span style="color:#000;font-weight:bold">return</span> builder<span style="color:#000;font-weight:bold">.</span><span style="color:#008080">toString</span><span style="color:#000;font-weight:bold">();</span>  
</span></span><span style="display:flex;"><span>    <span style="color:#000;font-weight:bold">}</span>  
</span></span><span style="display:flex;"><span>  
</span></span><span style="display:flex;"><span>    <span style="color:#998;font-style:italic">/** 
</span></span></span><span style="display:flex;"><span><span style="color:#998;font-style:italic">     * 获得特定长度的一个随机十六进制数字字母混编字符串(所包含的字符包括0-9A-F) 
</span></span></span><span style="display:flex;"><span><span style="color:#998;font-style:italic">     *  
</span></span></span><span style="display:flex;"><span><span style="color:#998;font-style:italic">     * @param length 
</span></span></span><span style="display:flex;"><span><span style="color:#998;font-style:italic">     * @return 
</span></span></span><span style="display:flex;"><span><span style="color:#998;font-style:italic">     */</span>  
</span></span><span style="display:flex;"><span>    <span style="color:#000;font-weight:bold">public</span> <span style="color:#000;font-weight:bold">static</span> String <span style="color:#900;font-weight:bold">getRandomHexStr</span><span style="color:#000;font-weight:bold">(</span><span style="color:#458;font-weight:bold">int</span> length<span style="color:#000;font-weight:bold">)</span>  
</span></span><span style="display:flex;"><span>    <span style="color:#000;font-weight:bold">{</span>  
</span></span><span style="display:flex;"><span>        StringBuilder builder <span style="color:#000;font-weight:bold">=</span> <span style="color:#000;font-weight:bold">new</span> StringBuilder<span style="color:#000;font-weight:bold">();</span>  
</span></span><span style="display:flex;"><span>        Random random <span style="color:#000;font-weight:bold">=</span> <span style="color:#000;font-weight:bold">new</span> Random<span style="color:#000;font-weight:bold">();</span>  
</span></span><span style="display:flex;"><span>        <span style="color:#000;font-weight:bold">for</span> <span style="color:#000;font-weight:bold">(</span><span style="color:#458;font-weight:bold">int</span> i <span style="color:#000;font-weight:bold">=</span> 0<span style="color:#000;font-weight:bold">;</span> i <span style="color:#000;font-weight:bold">&lt;</span> length<span style="color:#000;font-weight:bold">;</span> i<span style="color:#000;font-weight:bold">++)</span>  
</span></span><span style="display:flex;"><span>        <span style="color:#000;font-weight:bold">{</span>  
</span></span><span style="display:flex;"><span>            <span style="color:#458;font-weight:bold">int</span> n <span style="color:#000;font-weight:bold">=</span> random<span style="color:#000;font-weight:bold">.</span><span style="color:#008080">nextInt</span><span style="color:#000;font-weight:bold">(</span>16<span style="color:#000;font-weight:bold">);</span>  
</span></span><span style="display:flex;"><span>            <span style="color:#000;font-weight:bold">if</span> <span style="color:#000;font-weight:bold">(</span>n <span style="color:#000;font-weight:bold">&lt;</span> 10<span style="color:#000;font-weight:bold">)</span>  
</span></span><span style="display:flex;"><span>            <span style="color:#000;font-weight:bold">{</span>  
</span></span><span style="display:flex;"><span>                builder<span style="color:#000;font-weight:bold">.</span><span style="color:#008080">append</span><span style="color:#000;font-weight:bold">(</span>n<span style="color:#000;font-weight:bold">);</span>  
</span></span><span style="display:flex;"><span>            <span style="color:#000;font-weight:bold">}</span>  
</span></span><span style="display:flex;"><span>            <span style="color:#000;font-weight:bold">else</span>  
</span></span><span style="display:flex;"><span>            <span style="color:#000;font-weight:bold">{</span>  
</span></span><span style="display:flex;"><span>                builder<span style="color:#000;font-weight:bold">.</span><span style="color:#008080">append</span><span style="color:#000;font-weight:bold">((</span><span style="color:#458;font-weight:bold">char</span><span style="color:#000;font-weight:bold">)</span> <span style="color:#000;font-weight:bold">(</span>n <span style="color:#000;font-weight:bold">+</span> 55<span style="color:#000;font-weight:bold">));</span>  
</span></span><span style="display:flex;"><span>            <span style="color:#000;font-weight:bold">}</span>  
</span></span><span style="display:flex;"><span>        <span style="color:#000;font-weight:bold">}</span>  
</span></span><span style="display:flex;"><span>        <span style="color:#000;font-weight:bold">return</span> builder<span style="color:#000;font-weight:bold">.</span><span style="color:#008080">toString</span><span style="color:#000;font-weight:bold">();</span>  
</span></span><span style="display:flex;"><span>    <span style="color:#000;font-weight:bold">}</span>  
</span></span><span style="display:flex;"><span>  
</span></span><span style="display:flex;"><span>    <span style="color:#000;font-weight:bold">public</span> <span style="color:#000;font-weight:bold">static</span> <span style="color:#458;font-weight:bold">void</span> <span style="color:#900;font-weight:bold">main</span><span style="color:#000;font-weight:bold">(</span>String<span style="color:#000;font-weight:bold">[]</span> args<span style="color:#000;font-weight:bold">)</span>  
</span></span><span style="display:flex;"><span>    <span style="color:#000;font-weight:bold">{</span>  
</span></span><span style="display:flex;"><span>        <span style="color:#000;font-weight:bold">for</span> <span style="color:#000;font-weight:bold">(</span><span style="color:#458;font-weight:bold">int</span> i <span style="color:#000;font-weight:bold">=</span> 0<span style="color:#000;font-weight:bold">;</span> i <span style="color:#000;font-weight:bold">&lt;</span> 100<span style="color:#000;font-weight:bold">;</span> i<span style="color:#000;font-weight:bold">++)</span>  
</span></span><span style="display:flex;"><span>        <span style="color:#000;font-weight:bold">{</span>  
</span></span><span style="display:flex;"><span>            System<span style="color:#000;font-weight:bold">.</span><span style="color:#008080">out</span><span style="color:#000;font-weight:bold">.</span><span style="color:#008080">println</span><span style="color:#000;font-weight:bold">(</span>RandomUtils<span style="color:#000;font-weight:bold">.</span><span style="color:#008080">getRandomAlphamericStrNew</span><span style="color:#000;font-weight:bold">(</span>4<span style="color:#000;font-weight:bold">));</span>  
</span></span><span style="display:flex;"><span>            <span style="color:#998;font-style:italic">// String num = String.format(&#34;%09d&#34;, new Random().nextInt(100000));  
</span></span></span><span style="display:flex;"><span><span style="color:#998;font-style:italic"></span>            <span style="color:#998;font-style:italic">// System.out.println(num);  
</span></span></span><span style="display:flex;"><span><span style="color:#998;font-style:italic"></span>        <span style="color:#000;font-weight:bold">}</span>  
</span></span><span style="display:flex;"><span>  
</span></span><span style="display:flex;"><span>    <span style="color:#000;font-weight:bold">}</span>  
</span></span><span style="display:flex;"><span><span style="color:#000;font-weight:bold">}</span>  
</span></span></code></pre></td></tr></table>
</div>
</div><h2 id="2凯撒算法工具类">2、凯撒算法工具类</h2>
<div class="highlight"><div style="background-color:#fff;-moz-tab-size:4;-o-tab-size:4;tab-size:4;">
<table style="border-spacing:0;padding:0;margin:0;border:0;"><tr><td style="vertical-align:top;padding:0;margin:0;border:0;">
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</span><span style="white-space:pre;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">106
</span></code></pre></td>
<td style="vertical-align:top;padding:0;margin:0;border:0;;width:100%">
<pre tabindex="0" style="background-color:#fff;-moz-tab-size:4;-o-tab-size:4;tab-size:4;"><code class="language-java" data-lang="java"><span style="display:flex;"><span><span style="color:#000;font-weight:bold">public</span> <span style="color:#000;font-weight:bold">class</span> <span style="color:#458;font-weight:bold">Caesar</span>  
</span></span><span style="display:flex;"><span><span style="color:#000;font-weight:bold">{</span>  
</span></span><span style="display:flex;"><span>    <span style="color:#000;font-weight:bold">private</span> String table<span style="color:#000;font-weight:bold">;</span>  
</span></span><span style="display:flex;"><span>    <span style="color:#000;font-weight:bold">private</span> <span style="color:#458;font-weight:bold">int</span> seedA <span style="color:#000;font-weight:bold">=</span> 1103515245<span style="color:#000;font-weight:bold">;</span>  
</span></span><span style="display:flex;"><span>    <span style="color:#000;font-weight:bold">private</span> <span style="color:#458;font-weight:bold">int</span> seedB <span style="color:#000;font-weight:bold">=</span> 12345<span style="color:#000;font-weight:bold">;</span>  
</span></span><span style="display:flex;"><span>  
</span></span><span style="display:flex;"><span>    <span style="color:#000;font-weight:bold">public</span> <span style="color:#900;font-weight:bold">Caesar</span><span style="color:#000;font-weight:bold">(</span>String table<span style="color:#000;font-weight:bold">,</span> <span style="color:#458;font-weight:bold">int</span> seed<span style="color:#000;font-weight:bold">)</span>  
</span></span><span style="display:flex;"><span>    <span style="color:#000;font-weight:bold">{</span>  
</span></span><span style="display:flex;"><span>        <span style="color:#000;font-weight:bold">this</span><span style="color:#000;font-weight:bold">.</span><span style="color:#008080">table</span> <span style="color:#000;font-weight:bold">=</span> chaos<span style="color:#000;font-weight:bold">(</span>table<span style="color:#000;font-weight:bold">,</span> seed<span style="color:#000;font-weight:bold">,</span> table<span style="color:#000;font-weight:bold">.</span><span style="color:#008080">length</span><span style="color:#000;font-weight:bold">());</span>  
</span></span><span style="display:flex;"><span>    <span style="color:#000;font-weight:bold">}</span>  
</span></span><span style="display:flex;"><span>  
</span></span><span style="display:flex;"><span>    <span style="color:#000;font-weight:bold">public</span> <span style="color:#900;font-weight:bold">Caesar</span><span style="color:#000;font-weight:bold">(</span>String table<span style="color:#000;font-weight:bold">)</span>  
</span></span><span style="display:flex;"><span>    <span style="color:#000;font-weight:bold">{</span>  
</span></span><span style="display:flex;"><span>        <span style="color:#000;font-weight:bold">this</span><span style="color:#000;font-weight:bold">(</span>table<span style="color:#000;font-weight:bold">,</span> 11<span style="color:#000;font-weight:bold">);</span>  
</span></span><span style="display:flex;"><span>    <span style="color:#000;font-weight:bold">}</span>  
</span></span><span style="display:flex;"><span>  
</span></span><span style="display:flex;"><span>    <span style="color:#000;font-weight:bold">public</span> <span style="color:#900;font-weight:bold">Caesar</span><span style="color:#000;font-weight:bold">()</span>  
</span></span><span style="display:flex;"><span>    <span style="color:#000;font-weight:bold">{</span>  
</span></span><span style="display:flex;"><span>        <span style="color:#000;font-weight:bold">this</span><span style="color:#000;font-weight:bold">(</span>11<span style="color:#000;font-weight:bold">);</span>  
</span></span><span style="display:flex;"><span>    <span style="color:#000;font-weight:bold">}</span>  
</span></span><span style="display:flex;"><span>  
</span></span><span style="display:flex;"><span>    <span style="color:#000;font-weight:bold">public</span> <span style="color:#900;font-weight:bold">Caesar</span><span style="color:#000;font-weight:bold">(</span><span style="color:#458;font-weight:bold">int</span> seed<span style="color:#000;font-weight:bold">)</span>  
</span></span><span style="display:flex;"><span>    <span style="color:#000;font-weight:bold">{</span>  
</span></span><span style="display:flex;"><span>        <span style="color:#000;font-weight:bold">this</span><span style="color:#000;font-weight:bold">(</span><span style="color:#d14">&#34;ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz&#34;</span><span style="color:#000;font-weight:bold">,</span> seed<span style="color:#000;font-weight:bold">);</span>  
</span></span><span style="display:flex;"><span>    <span style="color:#000;font-weight:bold">}</span>  
</span></span><span style="display:flex;"><span>  
</span></span><span style="display:flex;"><span>    <span style="color:#000;font-weight:bold">public</span> <span style="color:#458;font-weight:bold">char</span> <span style="color:#900;font-weight:bold">dict</span><span style="color:#000;font-weight:bold">(</span><span style="color:#458;font-weight:bold">int</span> i<span style="color:#000;font-weight:bold">,</span> <span style="color:#458;font-weight:bold">boolean</span> reverse<span style="color:#000;font-weight:bold">)</span>  
</span></span><span style="display:flex;"><span>    <span style="color:#000;font-weight:bold">{</span>  
</span></span><span style="display:flex;"><span>        <span style="color:#458;font-weight:bold">int</span> s <span style="color:#000;font-weight:bold">=</span> table<span style="color:#000;font-weight:bold">.</span><span style="color:#008080">length</span><span style="color:#000;font-weight:bold">(),</span> index <span style="color:#000;font-weight:bold">=</span> reverse <span style="color:#000;font-weight:bold">?</span> s <span style="color:#000;font-weight:bold">-</span> i <span style="color:#000;font-weight:bold">:</span> i<span style="color:#000;font-weight:bold">;</span>  
</span></span><span style="display:flex;"><span>        <span style="color:#000;font-weight:bold">return</span> table<span style="color:#000;font-weight:bold">.</span><span style="color:#008080">charAt</span><span style="color:#000;font-weight:bold">(</span>index<span style="color:#000;font-weight:bold">);</span>  
</span></span><span style="display:flex;"><span>    <span style="color:#000;font-weight:bold">}</span>  
</span></span><span style="display:flex;"><span>  
</span></span><span style="display:flex;"><span>    <span style="color:#000;font-weight:bold">public</span> <span style="color:#458;font-weight:bold">int</span> <span style="color:#900;font-weight:bold">dict</span><span style="color:#000;font-weight:bold">(</span><span style="color:#458;font-weight:bold">char</span> c<span style="color:#000;font-weight:bold">,</span> <span style="color:#458;font-weight:bold">boolean</span> reverse<span style="color:#000;font-weight:bold">)</span>  
</span></span><span style="display:flex;"><span>    <span style="color:#000;font-weight:bold">{</span>  
</span></span><span style="display:flex;"><span>        <span style="color:#458;font-weight:bold">int</span> s <span style="color:#000;font-weight:bold">=</span> table<span style="color:#000;font-weight:bold">.</span><span style="color:#008080">length</span><span style="color:#000;font-weight:bold">(),</span> index <span style="color:#000;font-weight:bold">=</span> table<span style="color:#000;font-weight:bold">.</span><span style="color:#008080">indexOf</span><span style="color:#000;font-weight:bold">(</span>c<span style="color:#000;font-weight:bold">);</span>  
</span></span><span style="display:flex;"><span>        <span style="color:#000;font-weight:bold">return</span> reverse <span style="color:#000;font-weight:bold">?</span> s <span style="color:#000;font-weight:bold">-</span> index <span style="color:#000;font-weight:bold">:</span> index<span style="color:#000;font-weight:bold">;</span>  
</span></span><span style="display:flex;"><span>    <span style="color:#000;font-weight:bold">}</span>  
</span></span><span style="display:flex;"><span>  
</span></span><span style="display:flex;"><span>    <span style="color:#000;font-weight:bold">public</span> <span style="color:#458;font-weight:bold">int</span> <span style="color:#900;font-weight:bold">seed</span><span style="color:#000;font-weight:bold">(</span><span style="color:#458;font-weight:bold">int</span> seed<span style="color:#000;font-weight:bold">)</span>  
</span></span><span style="display:flex;"><span>    <span style="color:#000;font-weight:bold">{</span>  
</span></span><span style="display:flex;"><span>        <span style="color:#458;font-weight:bold">long</span> temp <span style="color:#000;font-weight:bold">=</span> seed<span style="color:#000;font-weight:bold">;</span>  
</span></span><span style="display:flex;"><span>        <span style="color:#000;font-weight:bold">return</span> <span style="color:#000;font-weight:bold">(</span><span style="color:#458;font-weight:bold">int</span><span style="color:#000;font-weight:bold">)</span> <span style="color:#000;font-weight:bold">((</span>temp <span style="color:#000;font-weight:bold">*</span> seedA <span style="color:#000;font-weight:bold">+</span> seedB<span style="color:#000;font-weight:bold">)</span> <span style="color:#000;font-weight:bold">&amp;</span> 0x7fffffffL<span style="color:#000;font-weight:bold">);</span>  
</span></span><span style="display:flex;"><span>    <span style="color:#000;font-weight:bold">}</span>  
</span></span><span style="display:flex;"><span>  
</span></span><span style="display:flex;"><span>    <span style="color:#000;font-weight:bold">public</span> String <span style="color:#900;font-weight:bold">chaos</span><span style="color:#000;font-weight:bold">(</span>String data<span style="color:#000;font-weight:bold">,</span> <span style="color:#458;font-weight:bold">int</span> seed<span style="color:#000;font-weight:bold">,</span> <span style="color:#458;font-weight:bold">int</span> cnt<span style="color:#000;font-weight:bold">)</span>  
</span></span><span style="display:flex;"><span>    <span style="color:#000;font-weight:bold">{</span>  
</span></span><span style="display:flex;"><span>        StringBuffer buf <span style="color:#000;font-weight:bold">=</span> <span style="color:#000;font-weight:bold">new</span> StringBuffer<span style="color:#000;font-weight:bold">(</span>data<span style="color:#000;font-weight:bold">);</span>  
</span></span><span style="display:flex;"><span>        <span style="color:#458;font-weight:bold">char</span> tmp<span style="color:#000;font-weight:bold">;</span>  
</span></span><span style="display:flex;"><span>        <span style="color:#458;font-weight:bold">int</span> a<span style="color:#000;font-weight:bold">,</span> b<span style="color:#000;font-weight:bold">,</span> r <span style="color:#000;font-weight:bold">=</span> data<span style="color:#000;font-weight:bold">.</span><span style="color:#008080">length</span><span style="color:#000;font-weight:bold">();</span>  
</span></span><span style="display:flex;"><span>        <span style="color:#000;font-weight:bold">for</span> <span style="color:#000;font-weight:bold">(</span><span style="color:#458;font-weight:bold">int</span> i <span style="color:#000;font-weight:bold">=</span> 0<span style="color:#000;font-weight:bold">;</span> i <span style="color:#000;font-weight:bold">&lt;</span> cnt<span style="color:#000;font-weight:bold">;</span> i <span style="color:#000;font-weight:bold">+=</span> 1<span style="color:#000;font-weight:bold">)</span>  
</span></span><span style="display:flex;"><span>        <span style="color:#000;font-weight:bold">{</span>  
</span></span><span style="display:flex;"><span>            seed <span style="color:#000;font-weight:bold">=</span> seed<span style="color:#000;font-weight:bold">(</span>seed<span style="color:#000;font-weight:bold">);</span>  
</span></span><span style="display:flex;"><span>            a <span style="color:#000;font-weight:bold">=</span> seed <span style="color:#000;font-weight:bold">%</span> r<span style="color:#000;font-weight:bold">;</span>  
</span></span><span style="display:flex;"><span>            seed <span style="color:#000;font-weight:bold">=</span> seed<span style="color:#000;font-weight:bold">(</span>seed<span style="color:#000;font-weight:bold">);</span>  
</span></span><span style="display:flex;"><span>            b <span style="color:#000;font-weight:bold">=</span> seed <span style="color:#000;font-weight:bold">%</span> r<span style="color:#000;font-weight:bold">;</span>  
</span></span><span style="display:flex;"><span>            tmp <span style="color:#000;font-weight:bold">=</span> buf<span style="color:#000;font-weight:bold">.</span><span style="color:#008080">charAt</span><span style="color:#000;font-weight:bold">(</span>a<span style="color:#000;font-weight:bold">);</span>  
</span></span><span style="display:flex;"><span>            buf<span style="color:#000;font-weight:bold">.</span><span style="color:#008080">setCharAt</span><span style="color:#000;font-weight:bold">(</span>a<span style="color:#000;font-weight:bold">,</span> buf<span style="color:#000;font-weight:bold">.</span><span style="color:#008080">charAt</span><span style="color:#000;font-weight:bold">(</span>b<span style="color:#000;font-weight:bold">));</span>  
</span></span><span style="display:flex;"><span>            buf<span style="color:#000;font-weight:bold">.</span><span style="color:#008080">setCharAt</span><span style="color:#000;font-weight:bold">(</span>b<span style="color:#000;font-weight:bold">,</span> tmp<span style="color:#000;font-weight:bold">);</span>  
</span></span><span style="display:flex;"><span>        <span style="color:#000;font-weight:bold">}</span>  
</span></span><span style="display:flex;"><span>        <span style="color:#000;font-weight:bold">return</span> buf<span style="color:#000;font-weight:bold">.</span><span style="color:#008080">toString</span><span style="color:#000;font-weight:bold">();</span>  
</span></span><span style="display:flex;"><span>    <span style="color:#000;font-weight:bold">}</span>  
</span></span><span style="display:flex;"><span>  
</span></span><span style="display:flex;"><span>    <span style="color:#000;font-weight:bold">public</span> String <span style="color:#900;font-weight:bold">crypto</span><span style="color:#000;font-weight:bold">(</span><span style="color:#458;font-weight:bold">boolean</span> reverse<span style="color:#000;font-weight:bold">,</span> <span style="color:#458;font-weight:bold">int</span> key<span style="color:#000;font-weight:bold">,</span> String text<span style="color:#000;font-weight:bold">)</span>  
</span></span><span style="display:flex;"><span>    <span style="color:#000;font-weight:bold">{</span>  
</span></span><span style="display:flex;"><span>        String ret <span style="color:#000;font-weight:bold">=</span> <span style="color:#000;font-weight:bold">null</span><span style="color:#000;font-weight:bold">;</span>  
</span></span><span style="display:flex;"><span>        StringBuilder buf <span style="color:#000;font-weight:bold">=</span> <span style="color:#000;font-weight:bold">new</span> StringBuilder<span style="color:#000;font-weight:bold">();</span>  
</span></span><span style="display:flex;"><span>        <span style="color:#458;font-weight:bold">int</span> m<span style="color:#000;font-weight:bold">,</span> s <span style="color:#000;font-weight:bold">=</span> table<span style="color:#000;font-weight:bold">.</span><span style="color:#008080">length</span><span style="color:#000;font-weight:bold">(),</span> e <span style="color:#000;font-weight:bold">=</span> text<span style="color:#000;font-weight:bold">.</span><span style="color:#008080">length</span><span style="color:#000;font-weight:bold">();</span>  
</span></span><span style="display:flex;"><span>  
</span></span><span style="display:flex;"><span>        <span style="color:#000;font-weight:bold">for</span> <span style="color:#000;font-weight:bold">(</span><span style="color:#458;font-weight:bold">int</span> i <span style="color:#000;font-weight:bold">=</span> 0<span style="color:#000;font-weight:bold">;</span> i <span style="color:#000;font-weight:bold">&lt;</span> e<span style="color:#000;font-weight:bold">;</span> i <span style="color:#000;font-weight:bold">+=</span> 1<span style="color:#000;font-weight:bold">)</span>  
</span></span><span style="display:flex;"><span>        <span style="color:#000;font-weight:bold">{</span>  
</span></span><span style="display:flex;"><span>            m <span style="color:#000;font-weight:bold">=</span> dict<span style="color:#000;font-weight:bold">(</span>text<span style="color:#000;font-weight:bold">.</span><span style="color:#008080">charAt</span><span style="color:#000;font-weight:bold">(</span>i<span style="color:#000;font-weight:bold">),</span> reverse<span style="color:#000;font-weight:bold">);</span>  
</span></span><span style="display:flex;"><span>            <span style="color:#000;font-weight:bold">if</span> <span style="color:#000;font-weight:bold">(</span>m <span style="color:#000;font-weight:bold">&lt;</span> 0<span style="color:#000;font-weight:bold">)</span>  
</span></span><span style="display:flex;"><span>            <span style="color:#000;font-weight:bold">{</span>  
</span></span><span style="display:flex;"><span>                <span style="color:#000;font-weight:bold">break</span><span style="color:#000;font-weight:bold">;</span>  
</span></span><span style="display:flex;"><span>            <span style="color:#000;font-weight:bold">}</span>  
</span></span><span style="display:flex;"><span>            m <span style="color:#000;font-weight:bold">=</span> m <span style="color:#000;font-weight:bold">+</span> key <span style="color:#000;font-weight:bold">+</span> i<span style="color:#000;font-weight:bold">;</span>  
</span></span><span style="display:flex;"><span>            buf<span style="color:#000;font-weight:bold">.</span><span style="color:#008080">append</span><span style="color:#000;font-weight:bold">(</span>dict<span style="color:#000;font-weight:bold">(</span>m <span style="color:#000;font-weight:bold">%</span> s<span style="color:#000;font-weight:bold">,</span> reverse<span style="color:#000;font-weight:bold">));</span>  
</span></span><span style="display:flex;"><span>        <span style="color:#000;font-weight:bold">}</span>  
</span></span><span style="display:flex;"><span>        <span style="color:#000;font-weight:bold">if</span> <span style="color:#000;font-weight:bold">(</span>buf<span style="color:#000;font-weight:bold">.</span><span style="color:#008080">length</span><span style="color:#000;font-weight:bold">()</span> <span style="color:#000;font-weight:bold">==</span> e<span style="color:#000;font-weight:bold">)</span>  
</span></span><span style="display:flex;"><span>        <span style="color:#000;font-weight:bold">{</span>  
</span></span><span style="display:flex;"><span>            ret <span style="color:#000;font-weight:bold">=</span> buf<span style="color:#000;font-weight:bold">.</span><span style="color:#008080">toString</span><span style="color:#000;font-weight:bold">();</span>  
</span></span><span style="display:flex;"><span>        <span style="color:#000;font-weight:bold">}</span>  
</span></span><span style="display:flex;"><span>        <span style="color:#000;font-weight:bold">return</span> ret<span style="color:#000;font-weight:bold">;</span>  
</span></span><span style="display:flex;"><span>    <span style="color:#000;font-weight:bold">}</span>  
</span></span><span style="display:flex;"><span>  
</span></span><span style="display:flex;"><span>    <span style="color:#000;font-weight:bold">public</span> String <span style="color:#900;font-weight:bold">encode</span><span style="color:#000;font-weight:bold">(</span><span style="color:#458;font-weight:bold">int</span> key<span style="color:#000;font-weight:bold">,</span> String text<span style="color:#000;font-weight:bold">)</span>  
</span></span><span style="display:flex;"><span>    <span style="color:#000;font-weight:bold">{</span>  
</span></span><span style="display:flex;"><span>        <span style="color:#000;font-weight:bold">return</span> crypto<span style="color:#000;font-weight:bold">(</span><span style="color:#000;font-weight:bold">false</span><span style="color:#000;font-weight:bold">,</span> key<span style="color:#000;font-weight:bold">,</span> text<span style="color:#000;font-weight:bold">);</span>  
</span></span><span style="display:flex;"><span>  
</span></span><span style="display:flex;"><span>    <span style="color:#000;font-weight:bold">}</span>  
</span></span><span style="display:flex;"><span>  
</span></span><span style="display:flex;"><span>    <span style="color:#000;font-weight:bold">public</span> String <span style="color:#900;font-weight:bold">decode</span><span style="color:#000;font-weight:bold">(</span><span style="color:#458;font-weight:bold">int</span> key<span style="color:#000;font-weight:bold">,</span> String text<span style="color:#000;font-weight:bold">)</span>  
</span></span><span style="display:flex;"><span>    <span style="color:#000;font-weight:bold">{</span>  
</span></span><span style="display:flex;"><span>        <span style="color:#000;font-weight:bold">return</span> crypto<span style="color:#000;font-weight:bold">(</span><span style="color:#000;font-weight:bold">true</span><span style="color:#000;font-weight:bold">,</span> key<span style="color:#000;font-weight:bold">,</span> text<span style="color:#000;font-weight:bold">);</span>  
</span></span><span style="display:flex;"><span>    <span style="color:#000;font-weight:bold">}</span>  
</span></span><span style="display:flex;"><span>  
</span></span><span style="display:flex;"><span>    <span style="color:#000;font-weight:bold">public</span> <span style="color:#000;font-weight:bold">static</span> <span style="color:#458;font-weight:bold">void</span> <span style="color:#900;font-weight:bold">main</span><span style="color:#000;font-weight:bold">(</span>String<span style="color:#000;font-weight:bold">[]</span> args<span style="color:#000;font-weight:bold">)</span>  
</span></span><span style="display:flex;"><span>    <span style="color:#000;font-weight:bold">{</span>  
</span></span><span style="display:flex;"><span>        Caesar caesar <span style="color:#000;font-weight:bold">=</span> <span style="color:#000;font-weight:bold">new</span> Caesar<span style="color:#000;font-weight:bold">(</span><span style="color:#d14">&#34;0123456789qwertyuiopasdfghjklzxcvbnm&#34;</span><span style="color:#000;font-weight:bold">);</span>  
</span></span><span style="display:flex;"><span>        String data <span style="color:#000;font-weight:bold">=</span> caesar<span style="color:#000;font-weight:bold">.</span><span style="color:#008080">encode</span><span style="color:#000;font-weight:bold">(</span>32<span style="color:#000;font-weight:bold">,</span> <span style="color:#d14">&#34;23423&#34;</span><span style="color:#000;font-weight:bold">);</span>  
</span></span><span style="display:flex;"><span>        System<span style="color:#000;font-weight:bold">.</span><span style="color:#008080">out</span><span style="color:#000;font-weight:bold">.</span><span style="color:#008080">println</span><span style="color:#000;font-weight:bold">(</span>data<span style="color:#000;font-weight:bold">);</span>  
</span></span><span style="display:flex;"><span>        String pass <span style="color:#000;font-weight:bold">=</span> caesar<span style="color:#000;font-weight:bold">.</span><span style="color:#008080">decode</span><span style="color:#000;font-weight:bold">(</span>32<span style="color:#000;font-weight:bold">,</span> data<span style="color:#000;font-weight:bold">);</span>  
</span></span><span style="display:flex;"><span>        System<span style="color:#000;font-weight:bold">.</span><span style="color:#008080">out</span><span style="color:#000;font-weight:bold">.</span><span style="color:#008080">println</span><span style="color:#000;font-weight:bold">(</span>pass<span style="color:#000;font-weight:bold">);</span>  
</span></span><span style="display:flex;"><span>  
</span></span><span style="display:flex;"><span>    <span style="color:#000;font-weight:bold">}</span>  
</span></span><span style="display:flex;"><span><span style="color:#000;font-weight:bold">}</span>
</span></span></code></pre></td></tr></table>
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        <li><strong>原文作者：</strong><a rel="author" href="https://anttu.gitee.io/">Anttu</a></li>
        <li style="word-break:break-all"><strong>原文链接：</strong><a href="https://anttu.gitee.io/post/2017-04-10-caeser/">https://anttu.gitee.io/post/2017-04-10-caeser/</a></li>
        <li><strong>版权声明：</strong>本作品采用<a rel="license" href="https://creativecommons.org/licenses/by-nc-nd/4.0/">知识共享署名-非商业性使用-禁止演绎 4.0 国际许可协议</a>进行许可，非商业转载请注明出处（作者，原文链接），商业转载请联系作者获得授权。</li>
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